# PPT - Plutonium-239.com

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29 Νοε 2013 (πριν από 4 χρόνια και 5 μήνες)

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Waves

Day 1

The Nature of Waves

Wave

Repeating disturbance that transfers energy

Some can travel through matter and space

Some just travel through matter

Move matter but transport energy

What would happen if

nothing were attached

to the buoy?

What are the different types of waves?

The Nature of Waves

Wave Types

Mechanical Waves

Require a medium (something to travel through)

Examples: water, sound, seismic (earthquake)

Transverse vs Compression

Transverse
-

medium moves back and forth at right

angles to the direction of the energy

Compression (longitudinal)
-

medium moves back

and forth in the direction of the energy

Electromagnetic
-

light, transverse, does not require a

medium

What are the different types of waves?

Day 2

How do waves affect matter?

Transverse

Compression

Direction

Of

Motion

Direction

Of

Motion

Carry

Energy

How do waves affect matter?

Mechanical

Electromagnetic

Requires

A

Medium

Travels

Through

Space

Carry

Energy

Day 3

Transverse Wave Part Notes

1.
Draw a transverse wave.

2.
Label the crest, trough, wavelength, amplitude,
and wave height.

What are the essential components of a wave?

Compression Wave Part Notes

1.
Draw a compression wave.

2.
Label the compression, rarefaction, and
wavelength.

What are the essential components of a wave?

Wave Part Notes

The wavelength is the distance between two _______

or two __________.

The _________ is the number of waves that pass a
set point in a second.

In a transverse wave the _________ is half of the
wave height and it is used to determine the amount
of _________ in a wave.

In a compressional wave the amplitude is the _______
of the compression.

The frequency and wavelength are inversely related.
This means as wavelength increases, the
frequency will ________, and vice versa. Note
that the __________ remains constant.

amplitude

crests

troughs

energy

frequency

amount

decrease

wave speed

What are the essential components of a wave?

Day 4

Wave Measurement Notes

Waves of the same type travel at the same
speed in the same medium

Speed of Sound in Air : 343 m/s

Speed of Sound in Water : 1482 m/s

Speed of Sound in Steel : 5960 m/s

Speed of Light in Space : 3.00 x 10
8

m/s

Equations

1.
Speed=Frequency x Wavelength

2.
Frequency = Speed/Wavelength

3.
Wavelength= Speed/Frequency

How can a wave be measured?

Speed

Frequency

Wavelength

What is the speed of sound

in a vacuum?

Day 5

Reflection

1.
Happens when waves _________
off of something.

2.
Changes the wave _________.

3.
The angle of __________ equals
the angle of __________.

4.
The ________ is perpendicular to
the surface.

5.
An example is:

Wave Interaction Notes

bounce

direction

What similarities and differences exist between reflection and refraction?

incidence

reflection

normal

Refraction

1.
Happens when waves _________

due to a change in mediums

2.
Changes the wave _________

3.
An example is:

Diffraction

1.
Happens when waves _________
around something.

2.
Changes the wave _________

3.
An example is:

Wave Interaction Notes

bend

direction

bend

direction

What similarities and differences exist between reflection and refraction?

Interference

1.
Happens when two waves _______

2.
Creates a _______ wave

3.
Two types of Interference:

1.
Constructive: The waves _____________

2.
Destructive: The waves _______________

4.
An example is

1.
_______________

Wave Interaction Notes

overlap

new

cancel one another

What similarities and differences exist between reflection and refraction?

Standing Wave: created
when waves continuously
interfere with each other

Day 6

Behavior of Waves Notes

Resonance

the process by which an object is made to vibrate
by absorbing energy at its natural frequency

this can be caused by soldiers marching across a
bridge or wind blowing on a bridge

How does the speed of an object cause the Doppler Effect?

Behavior of Waves Notes

Doppler Effect

change in pitch or frequency due to a moving
wave source, can also be caused by a moving
wave observer

an example is the sound of cars at a raceway

How does the speed of an object cause the Doppler Effect?